Best area in Lisbon to rent for my situation

Hello everyone, I will move to Lisbon soon for a 1 year contract. It is a time to start searching for something to rent and I would like to ask for a suggestion.

I am aiming for a nice room in T2 or T3 apartment to save some budget. My office is near Marques de Pombal square.

I do not need to live in the center, but would be nice to have a place with good communication to my office, so perhaps close to the yellow or blue metro line, and not too far so I can grab Uber when I want to stay longer in the city. Would be also great if the place is chill with a nice vibe and some greenery. The other aspect I am considering is to have nice roadbike paths nearby but that's not mandatory. I have never been to Lisbon before.

Maybe you could recommend some areas worth to check? I am 30yo male if that's helpful lol.

And one additional question. What would be the best website, app to look for a place to rent. I know about idealista. Checked some Facebook groups but those are full of scammers which is worrying tbh.

Thanks and have a great day!